/Engine/Plugins/FX/Niagara/Source/NiagaraShader/Public/NiagaraRibbonCompute.h
class FMyShaderDim : SHADER_PERMUTATION_BOOL("MY_SHADER_DEFINE_NAME");
class FRibbonHasRibbonID : public [FShaderPermutationBool](API\Runtime\RenderCore\FShaderPermutationBool)